This opinion piece from Bruce Katz is part of a series in which LinkedIn Influencers pick one big idea that will shape 2014. See the original article here.

As the United States slowly emerges from the Great Recession, led by our cities and metropolitan areas, a remarkable shift is occurring in the spatial geography of innovation.

For the past fifty years, the landscape of innovation has been epitomized by regions like Silicon Valley — suburban corridors of spatially isolated corporate campuses, accessible only by car, with little emphasis on the quality of life or on integrating work, housing and recreation.

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